Side loading syringe



Dec; 23,y 1941'. A A. E. SMITH SIDE LOADING SYRINGE Filed May 22, l19592 Sheets-Sheet l INVENTOR A iff'. VPA

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. Dec. 23, 1941. A. E. MlTH SIDE LOADING SYRIGE Filed May 22, 1959 2sheets-sheet 2 Amm E. smnh Patented Dec. 23, 1941 Unirse 'raar orxc 3Claims.

This invention relates to side loading syringe.

The general object of the invention is to provide an improved sideloading ampule ejecting syringe.

A more specific object of the invention is to provide a syringe whichincludes a barrel for receiving an ampule and wherein the rear oi thesyringe includes a movable plunger member having means movable with theplunger for rst centering and later ejecting an ampule from the syringebarrel. f

A further object of the invention is to provide an improved ejectingmeans for a side loading ampule type syringe.

Other objects and the advantages of this invention will be apparent fromthe following description taken in connection with the accompanyingdrawings, wherein:

Fig. l is a central sectional view through a syringe embodying thefeatures of my invention;

Fig. 2 is a fragmentary section tak-en on line 2 2, Fig. 1;

Fig. 3 is a section taken on line 3 3, Fig. 2;

Fig. 4 is a fragmentary central sectional view on an enlarged scale;

Fig. 5 is a View similar to Fig. 4 showing the parts in anotherposition;

Fig. 6 is a side elevation, partly in section, showing my invention;

Fig. 'l is a fragmentary enlarged sectional View showing the rear end ofthe barrel;

Fig. 8 is a section taken on line 8 3, Fig. 7; 'y

Fig. 9 is a section taken on line 9 9, Fig. '7;

Fig. 10 is a fragmentary sectional view showing the rear end of thebarrel and ampule;

Fig. 11 is a central sectional View showing the ampule and corks; and

Fig. l2 is a section taken on line |2 i2, Fig. 11.

Referring to the drawings by reference characters I have shown myinvention as embodied in a syringe which is indicated generally at iii.As shown the syringe includes a barrel H having a front member l2secured thereto. The front member includes an aperture i3 through whicha hypodermic needle M extends. The needle is heid in place by a capmember i5.

le barrel Il is cylindrical with the middle portion thereof out away asat i5 to allow an ampule l'! to be introduced into the barrel. The

includes spaced corks I9 and Z with a medicinal preparation 2| betweenthe corks and adapted to be discharged into the vehicle 22 in the ampuleto form a fresh solution for injection.

The rear of the barrel l l includes a collar por` tion 23 which extendssome distance along the barrel and is suitably secured to the barrel.Mounted upon the rear end of the barrel I show a rear end member 24.This member 24 includes a cap 25 having a skirt 26 thereon and with atube 2l mounted in thev cap and spaced therefrom. Mounted in the tube Ishow a cylinder 23 through which a plunger 29 extends. Thecollar` 23 onthe barrel slides within the skirt 25 while the tube 21 slides`withinthe barrel H. In orderto allow this sliding action aV screw Sil isthreaded through the lower end of the .collar 23 and through the barrelwith the inner lend. 3| of the' screw projecting into a s1ot 32.in thetube 2l.'

The lower end of the cylinder 28 is also slotted as at to receive thescrew when the parts are in the position shown in Fig. 5.f

The lower end of the plunger 29 includes a i L bevelled flange 34 whichengages a similarly bevelled portion 35 on the inner end of the cylinder28 to thus limit the outward 'movement of the plunger. The plungerincludes a projecting end 36 with a shoulder 31 adjacentthe bevelledportion. The plunger and flange are slotted as at 38 to receive apointed rod 38 which is secured to the cylinder 28 and which movesinwardly with the lcylinder when the cap is urged inwardly. The lowerend of the tube 21 is cut away at 4Q vto pro-a vide a slot through whicha resilient tongue 4! extends as is shown in Fig. 2. The upper end of.the tongue QI yis secured to the outer surface of the tube 2i and theinterior of the barrel Il includes a shallow longitudinal slot l2 whichreceives the tongue when thev latter is forced from its normal positionas shown in Figi.

In use an ampule isL placed in the barrel after the plunger has beenwithdrawn'to the position shown in Fig. 2. This act straightens thespring n 4i. The cap 25 is then shifted along the barrel to the positionshown in Fig. 4 where the rod 3B has 'entered a. recess'43 in the corkk2i). Further inward movement of the cap moves the parts to the positionshown in Fig; 5 wherein the rod 59 has pierced the inner wall of thecork 2G and has dislodged the cork l9`allowing themedicament 2! to bebrought into contact withthe vehicle 22 thus preparing the solution.Further inwardV movement of the plunger from the positionshovvn in Fig.5 causes the hollow needle lll to pierce the cork I8 if such act has notalready been performed during the previous steps.

Further movement of the plunger causes the cork 26 to act as a pistonand to force the contents of the ampule through the needle I4.

After the ampule contents are discharged the plunger is withdrawn fromthe barrel. The plunger moves first to the position shown in Fig. andthen moves outwardly with the bevelled portion 34 engaging the bevelledportion 35 and moving the entire end assembly rearwardly, thus movingthe lower end of the tube 21 (which is bevelled as at 44) from theampule thus freeing the latter and allowing the spring 4| to dislodgethe ampule from the barrel.

It will be noted that the rod 39 being Xed to the cylinder 28 does notmove into the ampule with the plunger so that therod is withdrawn fromthe cork 20 as the plunger moves inwardly and carries the cork alongwith it.

In Figs. 6 to 12, inclusive, I show a modification of my inventionwherein the syringe indicated generally at 50 includes a barrel 5|having a cut away portion 52 permitting the insertion of an ampule. Thebarrel includes a front member 53 similar to the front member l2previously described and the ampule 54 includes a closure 55 adapted tobe punctured by a needle 56.

The barrel includes a rear end 51 on which a cap member 58 is suitablysecured. A plunger.v

59 passes through the cap 58` and near one end includes acircumferentially disposed slot 60 in which the inner end 6I of a screw62 on the cap extends. The slot 60 communicates with a longitudinallyextending slot 83 which extends along the` plunger to a locationadjacent the outer end thereof.

Within the rear portion of the barrel I slidably mount a sleeve 84 whichhas a bevelled lower end 65 and which has a collar 66 securedintermediate itsu length by a pin 61. The collar 66 includes a centralaperture. 68 the lower portion of which is bevelled as at 69 to engage abevelled portion on the lower portion of the plunger.

Below the portion 'HJ the plunger includes a projection 'HV and anextension rod 12. A spring 13 surrounding the plunger rod engages thecollar 66 and normally urges the collar sleeve 64 and plunger 59inwardly with thepin end 6| sliding in the slot 63. When the plunger iswithdrawn from the barrel the end 8| of the screwY 62 will be alignedwith the circumferential slot 68 whereupon the plunger may be rotated tolock the plunger and its associated parts in retracted position.

The ampule 54 includes a rear piston cork assembly 14 which consists ofan outer cork 75 and an inner cork 16. The outer cork includes a recess'I1 adapted to receive the projection 'H on the plunger. The bottom ofthe recess 'VI is closed by a diaphragm 'I8 which is adapted to bepunctured by the extension rod 12 and thus allowthe rod 12 to strike atrap door 79; which is integral with the cork 18 and which normallycloses the lower end of a cavity 88 in which a medicinal preparation 8|is arranged.

TheV lower inner surface of the sleeve 64 is slotted as at 82 to receivea resilient tongue 83 which is secured at one end to the sleeve. The

other end of the tongue is free and normally' projects into the barrelas shown in Fig. 2. The tongue 83 forces a used ampule from the syringe,the action being similarto that of the tongue 4 previously described. A

In operation the plunger 59 is withdrawn and is locked with the pin end6| in the slot 60. An ampule is then inserted in the barrel after whichthe plunger is turned to release the sleeve which is urged forward bythe spring 13 so that it surrounds the outer end of the ampule.

When the plunger is pushed inwardly the rod 12 passes through the recess11, pierces the diaphragm 18 and dislodges the closure or trap door 19allowing the medicinal preparation to mingle with the fluid contents ofthe ampule to prepare a fresh solution.

The needle 56 having meanwhile pierced the closure 55 further inwardmovement of the plunger causes the latter to move the piston cork 'l5inwardly thus discharging the contents of the ampule through the needle56.

In Fig. 1 the upper end of the plunger is provided with a handle 85which rotates on the plunger and which is prevented from leaving theplunger by a screw 86 having a head 81 thereon which fits in acircumferential groove 88 in the plunger.

In Fig. 6 the handle 85' is rotatably held in place in the same mannerby a screw 86', the head 81 of which fits in a groove 88 in the plunger.v

From the foregoing description it will be apparent that I have inventeda novel syringe which is highly efficient for its intended purpose.

Having thus described my invention, I claim:

l. In a syringe, a barrel, said barrel having a lateral openingpermitting the insertion and removal of an ampule, an ampule in thebarrel, said ampule having a displaceable cork therein, a rear memberincluding a` cap having a portion slidable within the barrel, means tolimit the movement of the rear member on the barrel, a plunger movablein the slidable portion and including a shoulder adapted to engage theslidable portion when the plunger is moved outwardly, said plungerincluding a forwardly projecting end portion, said end portion includinga slotted part, a rod secured on the slidable portion and projectingbeyond the inner end thereof, said rod being movable with the slidableportion'to displace the displaceable cork, a resilient tongue mounted onthe slidable portion opposite to said lateral opening and normally urgedinto the barrel, and a cork in said .ampule and movable by said plunger.

2. In a syringe, a barrel having a front member thereon, said frontmember including a needle projecting into the barrel, said barrel havinga lateral opening permitting the insertion and removal of an ampule, anampule in the barrel, said ampule including a front cork with apierceable portion receiving said needle, a rear member on the barreland including a cap having a skirt portion slidable on the outside ofthe barrel, said cap including a tubular portion slidable within thebarrel, means to limit the movement of the rear member on the barrel, acylinder within said tubular portion, a plunger slidable in the cylinderand cap, said plunger including a shoulder adapted to engage thecylinder when theA plunger lis moved outwardly, said plunger including aforwardlyl projecting end portion, said end portion including a slottedpart, a rod secured on the interior of the cylinder and projectingbeyond the inner end of the cylinder and disposed in saidv plunger slot,a resilient tongue mounted on the lower portion of said tubular portionopposite to said' lateral opening, said tongue being normally urgedinwardly byits resiliency, the lower end of said tubular portion beingslotted to receive said tongue, a cork in said ampule adjacent saidplunger, a displaceable closure associated with the last mentioned cork,said cork including a portion adapted to be pierced by said rod, saidcork being movable by said plunger said rod being adapted to move thedisplaceable closure when the cylinder is moved.

3. In a syringe, a barrel having a front member thereon, said frontmember including a piercing member projecting into the barrel, saidbarrel having a lateral opening permitting the insertion and removal ofan ampule, an ampule in the barrel, said ampule including a front corkwith a piercable portion receiving said piercing member, a rear memberon the barrel and including a cap having a skirt portion slidable on theoutside of the barrel, said cap including a tubular portion slidablewithin the barrel, means to limit the movement of the rear member on thebarrel, a cylinder within said tubular portion, a plunger slidable inthe cylinder and cap, said plunger including a shoulder adapted toengage the cylinder when the plunger is moved outwardly, a resilienttongue mounted on the lower portion of said tubular portion opposite tosaid lateral opening, said tongue being normally urged inwardly by itsresiliency, and a cork in said ampule adjacent said plunger, said corkbeing movable by said plungen ARTHUR E. SMITH.

